Lock mechanism



IWIIH w 66 2 .5 0 m m 5 3 h 5 M Z w m 1L 1* w m; a VMMNMMMMUNV\MN\M\\\\\\\\N5 H I m 1932- J. E. CARR ET AL LOCK MECHANISMFiled May 1, 1930 2 sheets sheet 1 Dec. 27, 1932. J. E- CARR ET AL LOCKMECHANISM Filed May 1, 1930 2 Sheets-Sheet 2 fa/221.1 7. 801 7-JofinJOzeAL Patented Dec. 27, 1932 TES PAE are a:

JOHN E. CARR AND JOHN KNELL, 0F AURORA, ILLINOIS, ASSIGNORS T0ALL-STEEL- EQUIP COIvIPANY, A CORPORATION 013 ILLINOIS LOCK MECHANISMApplication filed May 1,

T is invention relates to a lock mechanism particularly adapted for use1n lockers, and

has among its principal objects to provide a Other and further objectsand advantageswill becoine apparent as the disclosure proceeds and thedescription is read in conjunction with the accompanying drawings, inwhich Fig. 1 is a front, elevational view of a lockor embodying one formof this invention;

Fig. 2 is a view showing a fragment of the door panel with the handleand lock cut away to expose the slotting of the panel;

Fig. 3 is a vertical,sectional view taken on the line 3-3 of Fig. 1;

Fig. at is a transverse, sectional view taken through the lock andcorner post on the line of Fig. 1;

Fig. 5 is a perspective view of. the lock plug head;

Fig. 6 is a transverse section of a door and corner post embodying amodified form of this invention, the lock in this case being secured tothe door panel 5 Fig. 7 is a vertical, sectional view of the same, thesection being taken on the line 77 of Fig. 6;

Fig. 8 is a vertical, sectional view of the embodiment shown in Figs. 6and 7, taken on the line 88 of Fig. 6; I

Fig. 9 is a view corresponding to Fig. 6 and represents still anotherembodiment of this invention; and

Figs. 10 and 11 are sectional views taken on the lines 1010 and 1111,respectively, of Fig. 9.

But these specific illustrations and the cor responding specificdescriptions are for the purpose of disclosures only for it is realizedthat the latch mechanism may be embodied in other relations and in otherforms without departin from the spirit of this invention.

A. conventional sheet metal locker has been chosen to illustrate oneapplication of this invention, and comprises a steel frame is of 1930.Serial nae-48,907.

having angle uprights 10, 11 and cross channels 12, 13. A door 14 ishinged at'15 to the upright- 11 and is adapted to be closed flush withthe front webs of the angle uprights 10, 11. The, edges of the door areturned inwardly at 16 and again at 17 to form a U-shaped reinforcingflange or channel.

Slidably mounted within the channel at the free edge of the door is alatch bar 18' out from fiat strip ofstout metal. Catches 19 are rivetedto the bar at suitable intervals and pass through elongated slots 20 inthe wall 17 of the flange. Preferably, the heads of the catches aretapered to a blunt point, and notch s 21 are cut into their lower edges.

A door 'jamb 22 is riveted or otherwise secured to the front web of theangle upright 10 and is provided with a plurality of lugs 23 extendingparallel to the plane ofthe door and occurring at intervalscorresponding to the catches on the latch bar.

A handle 24 is riveted to the latch bar at 25, the arms passing throughslots 26 in the door panel. The handle is cast with'an enlarged boss 27at one end, in this case the upper end, and is bored at 28 to receive alock plug 29 of a tumbler lock. The lock plug general cylindrical formbut the head is split along its ariis at 30 fora short distance and thensquared oii at 31, thus forming a shouldered semi-cylindrical head.

An irregularly shaped slot 82 isstamped from the door panel and mergeswith one of the slots 26. The shape of this slot is shown in Fig. 2 andis adapted to receive the semicylindrical head of the lock plug. Theslot is so shaped that when the catches on the latch bar are inengagement with the lugs 23 of the door jamb, the lock plug may be r0-tated to a position which will bring the face 30 of he head beneath ashoulder-r33 of the slot, thus preventing the bar from being raised toopen the door. The curved wall 34 of the slot accommodates .ly curvedsurface of the lockplug head.

V] hen the plug is rotated in a clockwise direction (Fig. 2) through theface 30 stri res the wall 35 and alines the plug head in the slot andpermits the latch bar to be the correspondingr raised and the dooropened. Inasmuch as the rotation of the lock plug is limited to 90, theinsertion and withdrawal of the key 36 is greatly facilitated.

Referring now to Figs. 6 to 11 inclusive, there are illustrated twoother forms of latch mechanisms, each of which has a stationary lock,that is a lock secured to the door panel and engaging the latch bar tolock the same against movement.

In the embodiment shownin Figs. 6, 7 and 8, a latch bar 37 is slidablymounted within the U-shaped channel at the free edge of the door anddiffers only from the latch bar 18 in that it is bowed at 38 andprovided with a notch 89 cut from one side of the bar. The

lock in this case is secured to the door panel preferably above thehandle. in all other respects. however. being similar to the lockalready described.

When the catches on the latch bar are fully seated upon the door jamblugs, the notch 39 is opposite the lock plug head, which may be rotatedto the position shown in full lines in Fig. 7 to lock the bar againstmovement. To open the door. the plug is rotated to the position shown indotted lines in the same figure. and the bar is then free to be raised.

In this embod ment, also. it will be noted that the parts cooperate tolimit the rotation of the plug to a given angle so that the key 36 maybe readily inserted and withdrawn.

In place of a bowed latch bar, a latch bar 40 may be substituted havinga finger l1 punched from one edge and adapted to engage the lock plughead when the face 30 is in a horizontal position. When the lock plug isrotated to the position shown in dotted lines, Fig. 10, the latch bar isfree from obstruction and the bar may be raised or lowered as desired.Since the tip of the finger 4C1 lies in a vertical plane, the plug canonly be rotated through 90 degrees.

It will be understood that the invention is not limited to theparticular form of lock plug head shown in the drawings and hereindescribed, the gist of the invention being to provide a lock plug havingan eccentric longitudinal projection and adapted to interlock with somerelatively fixed or movable part, as the case may be, to lock the baragainst movement.

e claim:

1. In a device of the class described, a door including a front panelmember. a latch bar member movable with respect to the door, a handlerigidly secured to the bar, means to lock the latch bar against movementincluding a rotatable key plug having a semi-cylindrical head having aradius not greater than that of said plug, said head being directlyengageable with an integral portion of one of said members.

2. A latch mechanism for locker doors comrisingin combination a movablelatch bar,

a lock plug having a semi-cylindrical locking head directly engageablewith the latch bar to lock the latch bar against movement.

3. A latch mechanism for locker doors comprising in combination, amovable latch bar, a rotatable lock plug having an eccentric,longitudinal projection, and a shoulder on the latch bar formed bystamping out a piece therefrom adapted to interlock with the plugprojection when the latter is in-agiven position to lock the bar againstmovement, said plug being rotatable to some other position, whereby thebar can be moved to unlatch the door.

4. In a latch mechanism for locker doors, comprising in combination amovable latch bar, means for locking the latch bar against movement,including a lock plug having an eccentric longitudinal projectiondirectly engageable with the latch bar, and a shoulder on the latch barformed by stamping out a piece therefrom for limiting rotation of thelock plug to a given angle.

5. In a device of the class described, a door provided with an elongatedslot having an enlargementat one end, a latch bar movable with respectto tie door, means to lock the latch bar against movement including arotatable lock plug movable with the latch bar, said plug having asemi-cylindrical head adapted to coact directly with the slot and holdthe latch bar against movement when the plug is in one position, butpermitting the latch bar to be moved when the plug is H in anotherposition.

In testimony whereof we a'liix our slgnatures.

JOHN E. CARR. JOHN KNELL.

